Steam boiler



Dec. 20, 1927.

E. G. OFELDT STEAM BGILER Filed April 2l, 1921 Il Il Ilm EES-EE IEE- ilo Patented Dec. 20, 1927.

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ERNEST G. FELDT, OF NYACK, NEW YCRK, SSXGNOR TO MEARS-ZANE-GFELDT, ENC., Gl? PHELDELEHEA, PENNSYLVANIA, A CORSORATION OF PENNSYLVANIA'.

STEAM IBOILER.

Application led April 21,

This invention relates to improvements in steam boilers and more particularly to that type which comprises a plurality of sections secured togetlier,-one Vobject of the invention being to so construct a sectional boiler that the saine may be easily and quickly assembled; so that an etlicient water circulation shall be assured; so that extensive heating surface shall be provided, and so that all parts of the furnace structure may be readily cleaned.

With these and other objects in view, theV invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims. i

ln the accompanying drawings; Figure'l is a vertical sectional view or a boiler embodying my improvements; Figure 2 is a horizontal sectional View; Figure 3 is a sectional view of one ot the units or sections ot' the boiler,v and Figures t and 5 are detail views.

rlhe boiler will preferably be made ot cast iron or steel and includes a plurality ot sections superimposed, one upon another. The Lipper section 1 of the boilerl forms a steam space or dome 2 and the lower section 3 provides the bottom e of the boiler, while the intermediate sections 5, are constructed to facilitate the water circulation in the boiler.

Y Each intermediate section or unit 5 coinf prises, in a single'casting, a hollow central or hub portion 6 which is internally threaded,l as at 7, (the top and bottom sections also having threaded portions 7) and a plurality otl radial, hollow arms 8 forming water chambers communicating at their inner ends with'said central or hub portion,-the several radial hollow arms being connected by a circular or peripheral wall 8CL having cleanout openings at intervals to communicate with the several water chambers and these openings are normally closed by threaded plugs 9. Each intermediate section or unit 5 also includes a series of baliles 10 cast in-` tegral therewith in the hollow"`arms 8, the several baffles radiating from a central ringl 10'L located within the central or hub portion 6 and their outer ends terminating comparatively short distances from the outer ends of said hollow arms. It will be observed that the several .radiating arms ot each section or unit form intermediate spaces i921'. seran No. leales.

11, through which heated products ot -com-v bustion may pass. The several sections or units of the boiler are so superimposed, one upon another, that the radial hollow arms oll one section or unit will be over. the spaces 11 between the radial hollow arms of the adja-k cent section or unit. It will be observed that the hub portions of adjacent units serve to so separate the arms ot adjacent units that spaces 11a are formed between such units and that these spaces V11a communicate with the spaces 11 formed between arms oi each unit, and that the projecting edges of the peripheral walls 8l oladjacent` -units also assist in such spacing of the units. By the construction and arrangement, maximum heating surface is provided for the water arms and the eliciency of the heating is enhanced by the circuitous passage of products ot combustion through the spaces 11 between the hollow arms of the severalsuperimposed sections or units. i 4

Each pair of sections or units maybe secured together by means of externally threaded rings 12 which engage y'threaded portions 7 of twoabuttingsections or units and thus connect the same.

A centrally disposed tube 13 (open at 'both ends) is provided at its upper end with a ilange 14 resting upon the ring 10a of the upper series or" battles 10. The tube thus hung or supported, passes downwardly through the rings 10a ot the other battles and terminates at its lower .end above the bottom e of the boiler. A smaller tube 15 (open at both ends)v depends into the upper portion of the tube 13 and is provided at its upper end with an annular ange 16. This liange rests upon a. flange 17 at the lower end of the uppermost connecting ring 12. It will be observed that the tube 15 extends an appreciable distance into the tube 13 and that the flange 16 at the upper end of said tube 15 is at the bottom ot the uppermost ring 12. The water will therefore be directed downwardly into the tube 13 and will be discharged into said tube 13 well below the upper end thereof and the steam will have free passage through the tube 15 and the ring 13 to the steam dome.

Vith my improvements, the water will find a circuitous path trointhe bottom ot the boiler through the highly' heated radial vater arms containing battles and will discharged 'from the upper intermediate section downwardly into the central tube 13 by which latter it will be directed toward the bott-om of the boiler.

`YVarious slight changes might be made in the details oi construction oi' my invention without departing from the spirit thereof or limiting its scope and hence l do not wish to restrict myself to the precise details herein set forth.

Having fully described my invention what I claim as new and desire vto secure by Letters lnatent, is

l. A. steam boiler comprising top and bot tom sections and a plurality' ot intermediate sections, the top section constituting a steam dome and the bottoni section constituting a receptacle. for return water, means for securing the sections together, each intermediate ysection comprising a hollow central portion, a plurality of radial water arms and a 'ba'lie in each lwater arm, a central ring connecting said battles, a tube supported by the ring o the uppermost series of baiiles and extending downwardly approximately to the bottom oi the boiler, said tube, communicating with the water arms et the uppermost intermediate section, and a smaller tube supported in position to communicate with the upper section and extending downwardly into the upper portion ot the lirstmentioned tube.

2. A steam boiler kcomprising top and bottom sections and a plurality of intermediate sections, said sections having central threaded Vportions and each having a plurality of radial hollow arms, threaded rings connect ing said sections, baffles in the radial arms of each intermediate section, a ring connecting the baiiles of each set, Va tube openat both ends and supported by the ring of the upper set of baes, said tube terminating at its lower end above the bottom of the boiler,

rality of intermediate sections each consist-V ing of a central hub, a plurality of hollow radial arms extending from the hub intermediate the upper and vlower ends thereof, and battles within the hollow arms extending into the hub, a tube open at both ends extending centrally through the baffles of all the intermediate sections in concentricy spaced relation to the hubs of said sections,.said

tube beinO suworted at its u Der end vb the uppermost baille and having its lower end within the bottom section o1 the boiler and all the ballles having a closed joint engagement with said tube, and means for directing water-from the uppermost of the intermediate sections into the upper end 'of said tube. e

In testimony whereof, l have signed this specification. v Y

`ERNEST G. OFELDT.

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